Abstract:
It is aimed at providing a heavy concrete, which does not require addition of a thickener such as methyl cellulose, which is less in segregation between a heavy aggregate and a cement paste, and which is high in flowability and excellent in construction ability. The present invention provides a heavy concrete comprising, at least, a cement, a heavy aggregate, and water, mixed with one another, characterized in that the heavy fine aggregate includes hot scarves brought about in a scarfing process of a steel slab surface. The present invention further provides the above-described heavy concrete characterized in that the heavy fine aggregate includes fine aggregate particles passing through a sieve having a nominal size of 0.15 mm, in an amount of 10% to 20% in mass percentage, and the heavy fine aggregate includes spherical particles each having a distortion irregularity of 3.3 or less as defined below, in an amount of 20% or more in the whole of particles having diameters between 50 μm inclusive and 5 mm inclusive in the heavy fine aggregate: [Distortion irregularity]=[Length of circumferential outline of particle]/[Diameter of true circle having the same area as the area of the particle providing the outline].
Abstract:
It is aimed at providing a heavy concrete, which does not require addition of a thickener such as methyl cellulose, which is less in segregation between a heavy aggregate and a cement paste, and which is high in flowability and excellent in construction ability. The present invention provides a heavy concrete comprising, at least, a cement, a heavy aggregate, and water, mixed with one another, characterized in that the heavy fine aggregate includes hot scarves brought about in a scarfing process of a steel slab surface. The present invention further provides the above-described heavy concrete characterized in that the heavy fine aggregate includes fine aggregate particles passing through a sieve having a nominal size of 0.15 mm, in an amount of 10% to 20% in mass percentage, and the heavy fine aggregate includes spherical particles each having a distortion irregularity of 3.3 or less as defined below, in an amount of 20% or more in the whole of particles having diameters between 50 μm inclusive and 5 mm inclusive in the heavy fine aggregate: [Distortion irregularity]=[Length of circumferential outline of particle]/[Diameter of true circle having the same area as the area of the particle providing the outline].
Abstract:
Disclosed is a counterweight which is filled with a heavy-weight concrete containing, instead of currently used iron ores, a heavy-weight aggregate that scarcely causes the material segregation from cement paste and which can be produced at a low cost and is effectively enhanced in the filling factor of heavy-weight concrete into a case. A counterweight 6 comprises a case 62 and heavy-weight concrete filled therein, wherein the heavy-weight concrete contains a heavy-weight fine aggregate containing 20 mass % or more of aggregate particles having particle diameters of less than 0.15 mm and 20 mass % or more of aggregate particles having particle diameters of 2.5 mm to less than 5 mm.
Abstract:
Disclosed is a counterweight which is filled with a heavy-weight concrete containing, instead of currently used iron ores, a heavy-weight aggregate that scarcely causes the material segregation from cement paste and which can be produced at a low cost and is effectively enhanced in the filling factor of heavy-weight concrete into a case. A counterweight 6 comprises a case 62 and heavy-weight concrete filled therein, wherein the heavy-weight concrete contains a heavy-weight fine aggregate containing 20 mass % or more of aggregate particles having particle diameters of less than 0.15 mm and 20 mass % or more of aggregate particles having particle diameters of 2.5 mm to less than 5 mm.
Abstract:
The invention has an object to provide a heavyweight fine aggregate and a heavyweight aggregate for a stiff heavyweight concrete having a slump of 0 to 3 cm, in which segregation from the cement paste is unlikely to occur, and to provide a stiff heavyweight concrete having a slump of 0 to 3 cm, using the heavyweight fine aggregate and heavyweight aggregate. The heavyweight fine aggregate comprises no less than 20 wt % of aggregate having a particle size smaller than 0.15 mm, and no less than 20 wt % of aggregate having a particle size from 2.5 mm to less than 5 mm. The above feature allows effectively inhibiting segregation between the aggregate and cement paste when blending the aggregate into the heavyweight concrete, and allows effectively increasing the filling rate in boxes when blending the aggregate into the heavyweight concrete for box filling.
Abstract:
The invention has an object to provide a heavyweight fine aggregate and a heavyweight aggregate for a stiff heavyweight concrete having a slump of 0 to 3 cm, in which segregation from the cement paste is unlikely to occur, and to provide a stiff heavyweight concrete having a slump of 0 to 3 cm, using the heavyweight fine aggregate and heavyweight aggregate. The heavyweight fine aggregate comprises no less than 20 wt % of aggregate having a particle size smaller than 0.15 mm, and no less than 20 wt % of aggregate having a particle size from 2.5 mm to less than 5 mm. The above feature allows effectively inhibiting segregation between the aggregate and cement paste when blending the aggregate into the heavyweight concrete, and allows effectively increasing the filling rate in boxes when blending the aggregate into the heavyweight concrete for box filling.
Abstract:
It is aimed at inexpensively providing a heavy aggregate comprising particles having particle diameters and densities suitable as a fine aggregate of a heavy concrete, heavy mortar, or the like, and there are provided: (i) a heavy aggregate comprising particles including, as a main constituent component, at least one of FeO, Fe2O3, and metal iron, characterized in that spherical particles are included in an amount of 20% or more in the whole of particles, and particles passing through a sieve having a nominal size of 0.15 mm are included in an amount of 10% to 20% in mass percentage in the whole of particles; and (ii) the above-described heavy aggregate characterized in that the heavy aggregate is obtained by mutually mixing at least two or more kinds selected from: mill scales brought about in a rolling process of steelmaking; coarse particle components sievedly caught at a particle diameter of 50 μm from steelmaking converter dusts; and pig iron particles separated from blast furnace granulated slags.
Abstract translation:其目的在于廉价地提供包含具有适合作为重混凝土,重质砂浆等的细骨料的粒径和密度的颗粒的重骨料,并且提供:(i)包含颗粒的重骨料,其包括作为 主要成分组分,FeO,Fe 2 O 3和金属铁中的至少一种,其特征在于在整个颗粒中包含20%或更多的球形颗粒,通过标称尺寸为0.15mm的筛子的颗粒 在整个颗粒中的质量百分比为10%至20%; 和(ii)上述重质骨料,其特征在于,通过相互混合选自:在炼钢轧制过程中产生的轧制尺寸中的至少两种或更多种,获得重骨料; 从炼钢转炉粉尘中筛选出粒径为50μm的粗颗粒组分; 和高铁矿渣分离的生铁颗粒。
Abstract:
This invention relates to a binder comprising (a) a polyamine-epichlorhydrine resin obtained by reacting epichlorhydrine with a polyamine resin having at least 2 amino groups per molecule; and (b) an amphoteric high molecular compound having at least 2 cation groups and at least 2 anion groups per molecule.